My bf lied to me what should i do?😢

So listen me and my bf are very much in love new love but ima one shot type of chick. Fuck it up and bye !! But we've shared things with one another that I've never shared neither he . were trying to build our life together and build it on a truthful foundation and that's really hard for mee cause that means I have to show flaws and I hate that but I really do lobe him but we got into an argument because his bestfriend and my bestfriend are kinda dating my bff told his friend something personal about her and not to tell no one . but he told my bf and my bf told me when he was talking shit about my bff . I said to him did your friend tell you that he said no three or four times . mind you he knows I hate liars . and he processed to lie then I told him that I know your friend told me because my bff told me that she told him and only him . he came clean and said I fucked up .. But I got extremely mad cause were not supposed to keep anything from each other. But nevertheless what should I do ? How do I make him understand that I ain't having that shit !! What should I do ?😮😕😣